Mechanical properties of annealed and martensitic Ti--6Al--4V. (A. ) microstructure of solution treated Ti--6Al--4V. (B. ) a study of fatigue damage with ultrasonic internal friction measurements. (C. ). Technical report
Fatigue life studies are reported on annealed microstructures and on solution treated plus quenched microstructures, and it was found that specimens solution treated at about 900 C (1650 F) had the longest fatigue life, longer by at least a factor of four. The microstructure of solution treated and quenched Ti--6Al--4V is reported with particular emphasis on the solution temperature of 900 C (1650 F). It is proposed that it is the strain induced transformation of retained beta phase to martensite that is producing the improved fatigue life of this alloy. Internal friction measurements using a resonance technique at kilohertz (17650 Hz) frequency were made on Ti--6Al--4V that had been subject to cyclic fatigue loading. The measurements showed that the internal friction increased as the fatigue damage was increased.
- Research Organization:
- George Washington Univ., Washington, DC (USA). Inst. for the Study of Fatigue Fracture and Structural Reliability
- DOE Contract Number:
- N00019-76-C-0136
- OSTI ID:
- 7220175
- Report Number(s):
- AD-A-038412
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanical properties and microstructure of heat treated and quenched Ti-6aL-4V. Final report, 1 September 1976--30 September 1977
The Effect of processing on the 455 C tensile and fatigue behavior of boron-modified Ti-6Al-4V
Related Subjects
ALUMINIUM ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
TITANIUM BASE ALLOYS
VANADIUM ALLOYS
ANNEALING
CREEP
DUCTILITY
ELASTICITY
FAILURES
FATIGUE
INTERNAL FRICTION
KHZ RANGE 01-100
PHASE TRANSFORMATIONS
QUENCHING
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
ULTRASONIC TESTING
VERY HIGH TEMPERATURE
YIELD STRENGTH
ACOUSTIC TESTING
ALLOYS
CRYSTAL STRUCTURE
FREQUENCY RANGE
FRICTION
HEAT TREATMENTS
KHZ RANGE
MATERIALS TESTING
NONDESTRUCTIVE TESTING
PHYSICAL PROPERTIES
TESTING
TITANIUM ALLOYS
360103* - Metals & Alloys- Mechanical Properties
360102 - Metals & Alloys- Structure & Phase Studies